What are the characteristics of autumn? Autumn is one of the four seasons. In China, traditionally, "beginning of autumn" in the 24 solar terms is taken as the starting point of autumn. Entering autumn means that rainfall and humidity tend to decrease or decrease, so what are the characteristics of autumn?
What are the characteristics of autumn? 1 First, the overall appearance.
Autumn is the harvest season. Pear trees hang golden lanterns, apples show red cheeks, the sea of rice turns up Jin Lang, sorghum raises burning torches, and colorful chrysanthemums are graceful as fairies.
2. Autumn is a refreshing and fragrant season. Melons and fruits are fragrant, and the fragrance of apples, oranges, pears and grapes comes in waves. The osmanthus trees on both sides of parks and roads exude charming fragrance, which makes people stop to smell. It's refreshing.
Autumn is a happy season. Because autumn is pleasant and the sky is high and the clouds are light, it is most suitable for people to go out to play. Children, in particular, are playing on the lawn in the park, laughing in twos and threes. Grandparents do aerobics, play cards and talk and laugh in the park in the morning.
4. Autumn is a busy season. Farmers sweated through the rice fields, harvesting golden brown rice, drying it and processing it into rice. Who knows that every grain of Chinese food is hard? Fruit farmers shuttle between orchards to pick all kinds of fruits, picking mature fruits one by one and transporting them to all corners of the world. On various harvesting fronts, everyone is busy.
In addition, the weather has the following characteristics:
1, the temperature dropped obviously, the cold air in the north continued to invade, the solar radiation became less and less, and the temperature dropped obviously.
2, the temperature difference between day and night is large, the temperature is still high during the day, and the temperature may be very low in the morning and evening, and it even feels like two different seasons.
3, autumn typhoon should not be underestimated, autumn typhoon intensity is relatively strong, resulting in serious losses, affecting autumn travel.
4, windy weather increases, alternating cold and warm, so that warm air meets and interacts frequently, which is easy to form wind, so the autumn in the north is crisp.
5, the air is dry and humid, the temperature drops, the water evaporation is not obvious, the air humidity is small, and the strong wind will also aggravate the dryness.
6. In the rainy weather in West China, the frequent southbound air meets the stranded warm and humid air, which intensifies the front activity and produces long-term rainfall.
Second, the characteristics of autumn
Generally speaking, in autumn, the solar altitude angle decreases and the temperature decreases; The autumn wind is cool, the summer heat is gone, the fruits are covered with branches, and the fields are golden. Autumn is the harvest season, and many plants mature in autumn. In the subtropical region of the northern hemisphere, the temperature in autumn is obviously lower than that in summer. As the temperature drops, the leaves of many deciduous perennial plants will gradually change color, wither and fall off. Autumn is one of the four seasons.
Meteorologically, the autumn in the north temperate zone is from August 23rd (summer) to165438+1October 20th (light snow). Autumn in the south temperate zone is from February 19 (rain in the northern hemisphere) to May 2 1 (xiaoman in the northern hemisphere).
Autumn is the best time to keep fit, so you should eat vegetables. Vegetables can not only preserve health, but also help treat some diseases. In dry autumn, you should eat more green leafy vegetables, because it has high vitamin content, so it is good to eat more. Dark vegetables such as spinach, green vegetables, celery, chrysanthemum, amaranth, carrots, etc. Like brown-red vegetables, they are rich in vitamins and carotene.
1, rice fields in autumn
The sky is high, You Lan. There are several white clouds floating in the high blue sky. Under the blue sky are endless rice fields. When the rice is ripe, Huang Chengcheng's is like spreading gold all over the floor.
There is a pond beside the rice field. There is a buttonwood tree by the pond. Pieces of yellow leaves fell from the tree. Some fell into the water, and the small fish swam to hide under it and used it as an umbrella. Some landed on the shore, and ants climbed up and ran back and forth, using this place as a playground.
Two swallows fly from the rice field. They saw the leaves falling and cried as they flew, as if to say, "The telegram is coming, urging us to go to the south quickly!" " "
2. Autumn photos
Autumn has come, and everyone has put on thick skirts. In the orchard, apples are red, persimmons hang on the branches like small lanterns, and pear trees are full of fruits, like many small gourds saying, "Autumn is coming, autumn is coming!" " "
In the farmland, the rice is bent with laughter, the sorghum is red, and the farmer's uncle is harvesting. Chrysanthemums are in full bloom in the garden, and so are osmanthus. Chrysanthemum combs its beautiful hair, and osmanthus also exudes a faint fragrance. Autumn is really a beautiful picture!
3. Harvest autumn
Autumn is coming, and the sky is as blue as transparent blue glass; A flock of geese fly south, and will be lined up with the word "people" and "one" in a moment.
In the park, Aunt Maple Leaf took off her green coat and put on a red coat. Autumn wind blows, and maple leaves fall from the trees like many beautiful butterflies.
Aunt willow and buttonwood also took off their green coats and put on their yellow coats; Grandpa Pine is still wearing a green coat;
Sister chrysanthemum blooms in the autumn wind; The grass on the ground is east and west, without the density of spring and the green of summer;
In the pond next to it, Sister Furong has long since disappeared. All the children who came to play in the park put on sweaters.
In the orchard, there are many fruits. Begonia fruit shakes its round face and nods and smiles at you; The big red apple is like a fat doll squeezed together, pulling open the green leaves and looking out with a smile; Big golden persimmons hang on trees like small lanterns.
In the field, the little green vegetables look very proud wearing grass-green military uniforms; Cauliflower hides a pale jade oval face in dark green leaves; The most interesting thing is soybean, with a small round head sticking out of the pod to look out; At first glance, the endless ears of rice undulate like the waves of the sea.
Ah! Golden autumn, I love you! Because you bring people the joy of harvest.
4. Autumn colors
Blue sky, white clouds,
The geese flew south in droves.
Grape purple, persimmon red,
A rope is like a lantern.
Keywords chrysanthemum yellow, rice flavor,
The sky is high and the clouds are light.
Colorful leaves, colorful chrysanthemums,
Autumn is colorful.
5. Orchard in autumn
In autumn, the fruit is ripe. In the sun, ripe persimmons are like red gems. Apples covered with trees are like children's smiling faces. Under the grape trellis, strings of red, white, green and purple grapes are shining with charming brilliance.
Well done! Orchard in autumn. A cool breeze blew, and the fruit nodded, emitting a sweet fragrance.
6. Parks in Autumn
Autumn, the park is beautiful!
All kinds of chrysanthemums are in full bloom, including red, yellow, white and purple. They are very beautiful. Osmanthus fragrans also bloomed, small and yellow, emitting a burst of fragrance.
The leaves of buttonwood are yellow, floating down one by one, like beautiful butterflies flying in the air. Maple leaves are red. From a distance, they look like red clouds. The pine and cypress are still so green and stand upright, like soldiers standing guard in the wind and rain.
7. Autumn photos
Autumn has come, autumn has come, and beautiful pictures have been drawn on the fields. Pears are hung with golden lanterns, apples show blushing cheeks, rice sea turns up flashing waves, and sorghum raises burning torches. Who makes autumn so beautiful? Listen to the geese in the blue sky. They line up in a big word "people", as if to say-hardworking people draw pictures of autumn.
What are the characteristics of autumn? 2. Overall characteristics
Generally speaking, in autumn, the solar altitude angle decreases and the temperature decreases; The autumn wind is cool, the summer heat is gone, the fruits are covered with branches, and the fields are golden.
1, phenology
Autumn is the harvest season, and many plants mature in autumn. In the subtropical region of the northern hemisphere, the temperature in autumn is obviously lower than that in summer. As the temperature drops, the leaves of many deciduous perennial plants will gradually change color, wither and fall off, leaving only branches for winter. Panicum miliaceum will come to the end of his life, wither and die.
2. Temperature
As can be seen from the date distribution map of beginning of autumn in China, Northeast China is the earliest place in beginning of autumn in eastern China. In autumn, the cold air in the north is constantly invading, but its power is not very strong. Autumn weather often forms in northern China, and continuous autumn rain often appears in West China. The temperature will gradually drop in autumn, but it is generally slower than in winter.
Due to the difference of dry and wet conditions, there will be cold and rainy weather conditions or dry and cool weather conditions in different regions. In the cold late autumn, due to the large temperature difference between day and night, the water vapor transpiration during the day will condense at night, either dew or frost.
3, the division standard
Divide four seasons according to climate and average temperature. The index is that the average temperature is below 10℃ in winter, above 22℃ in summer, and 10~22℃ in spring and autumn respectively. July to September in the lunar calendar, autumnal equinox to beginning of winter, September to 165438+ October in the solar calendar, and autumnal equinox to winter solstice in astronomy. In China, autumn begins in early autumn, passes through early autumn, Mid-Autumn Festival and late autumn, and finally ends in early winter.
The phenological standard studied by meteorologists is: after the intense summer heat, the average temperature for five days is stable below 22℃, which means that it enters autumn and ends when it is below 10℃.
4. Natural disasters
The main meteorological disasters in autumn are: autumn rain in West China, cold dew wind in the south, frost and chilling injury at low temperature.
Second, the characteristics of autumn
The temperature gradually drops, the autumn wind is refreshing, the summer heat gradually disappears, the fruits are covered with branches, and the fields are golden.
Autumn is the harvest season, and many plants mature in autumn. In the subtropical region of the northern hemisphere, the temperature in autumn is obviously lower than that in summer. As the temperature drops, the leaves of many deciduous perennial plants will gradually change color, wither and fall off, leaving only branches for winter. Panicum miliaceum will come to the end of his life, wither and die.
As can be seen from the date distribution map of beginning of autumn in China, Northeast China is the earliest place in beginning of autumn in eastern China. In autumn, the cold air in the north is constantly invading, but its power is not very strong. Autumn weather often forms in northern China, and continuous autumn rain often appears in West China. The temperature will gradually drop in autumn, but it is generally slower than in winter.
Due to the difference of dry and wet conditions, there will be cold and rainy weather conditions or dry and cool weather conditions in different regions. In the cold late autumn, due to the large temperature difference between day and night, the water vapor transpiration during the day will condense at night, either dew or frost.
Divide four seasons according to climate and average temperature. The index is that the average temperature is below 10℃ in winter, above 22℃ in summer, and 10~22℃ in spring and autumn respectively. July to September in the lunar calendar, autumnal equinox to beginning of winter, September to 165438+ October in the solar calendar, and autumnal equinox to winter solstice in astronomy. In China, autumn begins in early autumn, passes through early autumn, Mid-Autumn Festival and late autumn, and finally ends in early winter.
The phenological standard studied by meteorologists is: after the intense summer heat, the average temperature for five days is stable below 22℃, which means that it enters autumn and ends when it is below 10℃.